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2 Sheets-Sheet L J. W. SMALLW-OOD 8; D. R. AUSTIN.

ROTARY ENGINE.

Patented May 7. 1889.

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1am lam (No Model.) 2 sheets-s eet J. W. SM'ALLWOOD & D, R. AUSTIN.

- ROTARY ENGINE.

N0.402,625. Patented May 7,1889.

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UNITED i STATES PATENT OFFICE.

JOHN WV; SMALLWQOD AND DAVID R. AUSTIN, OF NEVADA, MISSOURI.

ROTARY ENGINE,

SPECIFICATION forming part of Letters Patent No. {102,625, dated May '7, 1889. I Application filed August 20, 1888. Serial No. 283,216. (No model.)

To all whom it may concern.-

Be i t known that We, JOHN WV. SMALLWO OD and DAVID R. AUSTIN, citizens of the United States, residing at Nevada, in the county of Vernon and State of Missouri, have invented certain new and useful Improvements in R0- tary Engines; and we do hereby declare the following to be a full;clear, and exact description of the invention, such as will enable others skilled in the art. to which it appertains to make and use the same.

Our invention relates to improvements in rotary engines, the object of which is to provide a simple and durable device for a rotary engine that will save steam, and one that will be easily reversed, and one that has no deadcenters, and the peculiar construction of the various parts of the device for the uses and purposes hereinafter specified. These objects we attain by means of the mechanism illustrated in the accompanying drawings, in whicha V Figure 1 is aview of the device, having the plate of one of the cylinders removed to show the interior. Fig. 2 is a vertical cross-section of one of the cylinders on the line X X of Fig. 1. Fig. 3 is a longitudinal vertical section of both cylinders on the line Y Y of Fig. 1. Fig.

4 is a detail of the device for changing the steam to reverse the engine. Fig. 5 is a detail showing the revolving valve. Fig. 6 is a View of one of the plates of the cylinder.

Similar letters of reference indicate corresponding parts in the several figures.

The rotary engine consists of two cylinders, one on each side of a steam-chest which is provided with a revolving valve, which alternately cuts'off the steam first on. one side and then on the other, and the revolving pistons are placed so that their slots which contain the adjustable wings will be opposite to each other, so that when one piston is half-way round the other piston will be just starting.

A A are cylinder-casings of any desired size. Said cylinders have end plates, A A and A A The said end plates have grooves A which are circular in form, except. on the side next to the supply and exhaust ports A A, which are located close to each other on opposite sides of the point A", where the cylinder may be easily and quickly opened to replace parts that are worn; and for this purpose and for the purpose of forming a tight joint the end or edge of the paddle D is provided with a groove, D in which is placed a strip of any suitable durable substance for forming the packing of the cylinder, and beneath which is placed a spring of any desired I kind for keeping the strip out against the cylinder as it and the strip wear by use. The spring F is preferably a long steel spring, as shown. The end plat-es A A also form the ends of the steam-chest K. Said chest has a supply-pipe, K which conducts the steam into the steam-chest.

'I and I is a revolving valve formed so that one end, 1 will close the port A while the other part is half-way round, as shown, the port A in the other cylinder being placed opposite the port A as shown. Thus but one of the ports is closed at a time, and then only for a short time, and that being while the wing in the piston passes the space between the ports A A of the cylinder. The pistons and revolving valve are secured firmly-to the driving-shaft O, which is provided with suitable bearings at E.

L is a reversingebox. It is provided with a reversing-valve, H, which has a handle, H for turning it as desired. Said boX has four openings, below which enter the cylinder and have passages which come together, one to enter the steam-chest A, the other to connect with the exhaust passage A Reversingvalve H is so placed that it will cover two of the openings at once-0ne exhaust and one supply at the same time-or may be turned so as to rest between the openings and thus throw the engine on a balance, and by turning still farther it closes the openings so as to reverse the engine.

H is a winch secured to the reversing-valve for turning the same, and to this crank is sevalve composed of portions I and 1 arranged cured a lever, H by which both of the reas shown, and shaft 0, all substantially as and 'ersing-valves are operated. for the purpose set forth.

Having thus described our invention,what In testimony whereof we afiix our signatures 15 5 we claim as new, and desire to secure hyLetin presence of two witnesses.

GETS Patent, JOHN W. SMALLVVOOD.

In a rotary engine, a reversing-valve, II, V Y T having a winch, 11*, ports A" A, a steam-box, DAN ID AL S1 L, cylinder-casings having grooves A and \Vitnesses: 1o abutments A pistons B, having wing D, hav- JOHN T. BIRDSEYE, ing' spring-packing steain-chestK, revolving E. E. KIMBALL. 

